Many Linux-based home gateway routers will respond to Telnet. If it lets you in, some elementary exploration can answer the question; a uname -a command, for instance. Another big clue is discovering that it runs BusyBox. BusyBox runs on other OSes besides Linux, but it's very commonly used on embedded Linuxes, whereas the more minimal stock

What OS does the router use? Is it Linux? - Quora Apr 27, 2017 AT&T releases white box spec for its Linux-based 5G routers Oct 03, 2018

Aug 25, 2016

Nov 01, 2017 4 Great Alternative Firmwares to Install on Your Router Jan 15, 2016 Linux Routers: A Primer for Network Administrators (2nd

Access routers, including small office/home office (SOHO) models, are located at home and customer sites such as branch offices that do not need hierarchical routing of their own. Typically, they are optimized for low cost. Some SOHO routers are capable of running alternative free Linux-based firmware like Tomato, OpenWrt or DD-WRT. [failed verification]

Nokia Launches New Linux-based Network Operating System First fully microservices-based NOS. So Nokia determined that there was a great opportunity for a next-generation switch built on an open Linux foundation, “so that all of the tools used to